Single magnetic domain

The magnetite crystals are well developed (euhedral), and this ensures that they act as single magnetic domains (SD) and produce remanent magnetization in sediments. The average number of magnetite crystals/cell in 220 cells of the microaero-... 

The crystallites grow within an organic membrane bound vesicle, or sac, the magnetosome. First a precursor iron oxide forms that matures into a single magnetic domain crystal of a magnetic iron mineral (Balkwill et al., 1980 Mann, 1985). The morphology of the individual crystallites is... 

The diameter of this particle is around 3000 A. For smaller or anisotropic particles, magnetization cannot be kept inside, and the particle is uniformly magnetized. An example of a barium-ferrite particle [2.16] is shown in Fig. 2.8. Here, magnetic fields leak from the north pole at the top of the particle and are then sucked up at the south pole. The particle can therefore be seen to have a single magnetic domain. 

Col] Colinet, C., Applications of the Cluster Variation Method to Empirical Phase Diagram Calculations , Calphad, 25(4), 607-623 (2001) (Assessment, Phase Relations, Review, 96) [2001Nas] Nascimento, V.P., Passamani, E.C., Takeuchi, A.Y., Larica, C., Nunes, E., Single Magnetic Domain Precipitates of Fe/Co and Fe and Co in Cu Matrix Produced from (Co-Fe)ZCu Metastable Alloys , J. Phys. Condens. Matter, 13(4), 665-682 (2001) (Crys. Structure, Experimental, Magn. Prop., Phase Relations, 17)... 

Arendt, R.H. (1973) The molten salt synthesis of single magnetic domain BaFei20]9 and SrFei20ig crystals./. Solid State Chem., 8 (4), 339-347. 

Fig. 1 Magnetosomes in a magnetotactic Spirillum species. The single magnetic domain, magnetite crystals form a chain across the baeterium and have typical elongate cuboctahedral 100 + 111 habit.

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